The Adsorption and Photo-reaction on of 1-，2-，3-Bromopropene on Powdered TiO2

• Main Authors: Lee Zhi Hong, 李志宏
• Other Authors: Su Chao Chin
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/70116128093312653621

碩士 === 國立臺北科技大學 === 有機高分子研究所 === 91 === Organic halides have good photo activity on TiO2. In this thesis, the adsorption and interaction of 1-，2-，3-bromopropene on powdered TiO2 were studied using FTIR(Fourier Infrared) technique. The result shows that 3-bromopropene chemically adsorbed on powdered TiO2 to form aldehyde species as vindicated by the absorption peaks at C-O (1087 cm-1)、CH2 (1392 cm-1)、C-H (1425 cm-1)、CH3 (1451 cm-1) and C=O (1688 cm-1). In the case of 2-bromopropene, only absorption peaks at C=O (1698 cm-1) and CH2 (1242 cm-1) were observed, indicating the formation of carbonyl group on TiO2. As for 1-bromoropene, the peaks are almost identical to gas phase ones, therefore, no chemisorption on TiO2 was concluded. The Br-C bond breaking capability of bromopropene strongly depends on the substituted position of bromine which consequently affect the chemistry of bromopropene on TiO2. After irradiation under the presence of oxygen, all these molecules were decomposed to form carbon dioxide (2352 cm-1). The possible side products and reaction pathway are discussed in the thesis.